Variable Non smoker (n= 1273) Smoker (n=177) Odds ratio (95% CI) P-value
Previous Sinonasal surgery 503 (39.6%) 51 (28.8%) 0.62 (0.44,0.87) 0.006
Previous sinus surgery (ESS) 156 (12.6%) 13 (7.6%) 0.57 (0.31,1.02) 0.056
Previous nasal polypectomy (ENP) 302 (26.8%) 20 (13%) 0.41 (0.25,0.66) <0.001
Multiple ESS/ENP 144 (12.6%) 13 (8.1%) 0.61 (0.34,1.10) 0.098